If Lemmy is not your cup of tea as an alternative to Reddit, maybe try open-source federated Kbin instead
gadgeteer.co.za
Yes, Reddit is going through its own API pains right now, and of course it is anyway a centralised social network much like Facebook and Twitter. So the discussion around alternatives has been coming up again. Lemmy has been around for a while, its technology is good, and it federates via ActivityPub to the rest...

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